diff --git a/.github/workflows/lint-unit.yml b/.github/workflows/lint-unit.yml
index 3d383f5..63c1129 100644
--- a/.github/workflows/lint-unit.yml
+++ b/.github/workflows/lint-unit.yml
@@ -82,7 +82,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["3.1", "3.2", "3.3"]
+        ruby: ["3.2", "3.3", "3.4"]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4